Packingless bearing.



A, n. CLAS. PACKINGLESS BEARING.

APPLICATION FILED JULY 3| 1914.

1,283 ,469, Patented Nov. 5, 1918.

y A mJi/f r I y "um r ears time NGELG ROBE' CLAS, 0F SHEBOYGAN FALLS, WISCONSIN', ASSGNOB, T0 'FALLS MACHINE COMPANY, F SHEBOYGN FALLS, WISCONSIN', A CORPORATION,

0E WSCONSEN.

PCKINGLESS BEARING.

naeaeea Application filed. July 3, wie.,

. To all 'whom it may concern;

Be it known that l, divento Renner Citas,

' a citizen of the United States, Vand resident of Sheboygan llalls, in the county of Shelll `looygan and State of Wisconsin, have inings tor automatic engine stops such as the engine stop mechanism covered by ILetters yPatent No., hill-669 to M., and QL Raymalrer,

dated Januar 16 1912 and has forv its ohu ect to avoid the necessity lor a steam tight paclnng surrounding the valve stem where .it passeront ci the valve casing, thusrelieving the valve ot the resistance incident tothe presence of a 'packing gland and ren- A dering it more sensitive in its operation.

With 'thefahove and other objects in view the invention consists in the paclcmgless hearing as herein claimed and all equiv alent'saf lteterrine to the accompanying drawings "in which lilre characters oit reference indicate the ,same parts, in the diderent views;

Figure l-is a sectional elevation et an automatic engine stop valve mechanism containing thel pacliingless hearing oil this invention; 4 I

Fig. 2 is a iront view thereof; and

Fig, 3 is a rear v ievv thereof with the rear plateremoved showing the valve on its seat in full-lines and open in dotted lines,

Fig. d is a sectional view oi a modilied form ofthe bearing;

In these drawings indicates a valve casing in the form of a `cylindrical valve chamber `extending across a steampassa neway'and provided with a valve seat 11 with its face concentric with the' cylindrical valve chamber. rlhe valve chamber 12 is shaped to t the valve seat and is pivptally mounted in the valve casing at 'a point to one side of the center of the valve casing so. as to be eccentric thereto, the valve tace onlyheing concentric with the casing when in itsu rl`his arran ment et the closed position, valve is designed to ador a minimum amount of friction in closing as well as a maximum valve clearance for a minimum valve movement and as the operation of the valve is intended to'be automatic the pack- Specication of Letters Patent.

v Patented Nov., 5, luid,

Serial No. 848,709.

ingless bearing of this invention is provided for the valve stem. A casing head 13 closes the en d of the cylindrical casing at the rear thereof and has the valve pivotally mounted therein in lany desirable manner, while a casing heal 14 similarly closing the front end of the valve casingl forms a tubular bearing sleeve 15 through which the valve stem 16l passes. squared end )fitting into a socket in the end of the valve 12, and also has an annular shoulder 17 which is rounded or converted ,upon its, outer surface.. il bushing 18 of a' non-corrosive kmetal is tted into a recess provided for it in the inner end of the bearing sleeve 15 and is preferably held in place by having-a tight driving t within such recess and this bushing at its inner edge is beveled so as to cooperate with the rounded or spherical surface oit shoulder 17 in producing a steam tight lit. rlhe beveled seat may he on the casing head direct instead of lon a bushing. ln ordertc insure a perfectly close it ci these parte they are `preferably lapped together.

it the outer end of the valvestem l@ is secured a weighted arm 19' ldtting on a squared portion oi the valve stem and'having a projecting horn 2t) engaged nby a pivoted dog 21 which is released xhy a solenoid 22 oroth erwise to permit the weighted armto drop and swing the valve 12 to its closed position upon the occurrence ot an abnormal speed of the engine receiving steam through the valve mechanism, or upon the operation i of hand controlling means or otherwise. 'llhe pressureo the steam within the valve chamber serves to forcibly hold the Vvalve stem.

18 to main- 16 irmly against the lcushingv tain the steam tight t between the beveled Vsurface of the bushing and the rounded or spherical surface of the valve stem shoulder 17', and a coil spring 23 surrounding the valve stem and bearing against the arm 19 'lhe valve stem 16 has a und! sem? a mh@ member mzmpted fu@ b';

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